diff options
| author | Richard Zhu <Richard.Zhu@freescale.com> | 2015-05-15 14:22:03 +0800 |
|---|---|---|
| committer | Richard Zhu <Richard.Zhu@freescale.com> | 2015-05-18 09:58:22 +0800 |
| commit | 1046f1eb20979cdd874d99601ee889ddf26caf51 (patch) | |
| tree | e7461bfcf9c8a544a2ef1013cbcf83c6b6067070 | |
| parent | 098900a86bc4eeac59fce25473daaed21999b6a6 (diff) | |
MLK-10894 pci: imx: Error message and kernel dump happens after resume
phenomena:
There is no such kind of phenomen when the "no_consol_suspend"
is added into kernel cmd line.
But there maybe kernel dump when the "no_consol_suspend" is
removed from kernel cmd line.
Root cause:
After the RC resume back and link is up, delay for a while is
required to let ep to resume from D3 mode
Regarding to RM DOC, no status bit can be used to make a
check on it, thus a while delay had been added.
Test results: Over weekend stress tests are passed.
Signed-off-by: Richard Zhu <Richard.Zhu@freescale.com>
| -rw-r--r-- | drivers/pci/host/pci-imx6.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c index 62d20f85fe8e..03e8aa3ea15b 100644 --- a/drivers/pci/host/pci-imx6.c +++ b/drivers/pci/host/pci-imx6.c @@ -1203,6 +1203,8 @@ static int pci_imx_resume_noirq(struct device *dev) ret = imx6_pcie_wait_for_link(pp); if (ret < 0) pr_info("pcie link is down after resume back.\n"); + /* Delay for a while, give ep some times to resume from D3 */ + udelay(200); } else { /* * L2 can exit by 'reset' or Inband beacon (from remote EP) |